Class AB amplifier and a distortion corrector therefor
AssigneeThomson-CSF
InventorJean Michel
Life of this patent
Estimating the term…
Abstract
A class AB amplifier and its distortion corrector are provided for obtaining linear amplification, even for low input signal levels. For this, at low levels, the distortion corrector has a response Vs'=f(Ve') (with Ve' and Vs': input and output voltages of the corrector) whose representative curve has a concavity turned towards the increasing values of Vs' whereas, up to now, a prejudice born of an insufficiently precise study of class AB amplifiers led to an inverse curve for the response of the corrector.
Claims2
A class AB amplifier including a distortion corrector, the corrector comprising a trough corrector, the quiescent current of the amplifier being chosen so that the characteristic Vs=f(Ve) of the amplifier, where Ve and Vs are respectively the input and output voltages of the amplifier has a monotonic variation drift,
- and wherein the characteristic Vs'=f (Ve') of the trough corrector where Ve' and Vs' are respectively the input and output voltages of the trough corrector has a concavity which increases in absolute value of slope towards increasing absolute values of Vs'.
Dependencies are inferred from the claim text.